Hi. I have CCM 6.1 and 2821 with vic2/4fxo, connected over h323. When i call on dn lets' ok, but when i call on PSTN over prefix (i have configered pattern for call on PSTN) i have delay 20-30 second whith the moment of a set of number also it is prior to the beginning call. How i can fix it?
If you don't have overlapping patterns and dn's then something you should check is the T302 timer under System>Service Parameters. The default is 15s but you can try lowering it to about 4s.
"This parameter specifies an interdigit timer for sending the SETUP ACK message. The timer restarts each time Cisco CallManager receives a digit. When this timer expires, Cisco CallManager routes the dialed digits."
Second thing is to make sure you have Allow Overlap Sending checkbox unchecked under Route Pattern Configuration. That is Call Routing>Route/Hunt>Route Pattern.